del
|
|
Vlad
|
Fri Feb 22 2013, 04:58PM
|
|
|
Registered Member #9711
Joined: Sat Jan 19 2013, 03:27PM
Location:
Posts: 65
|
del
|
Back to top
|
|
Proud Mary
|
|
Registered Member #543
Joined: Tue Feb 20 2007, 04:26PM
Location: UK
Posts: 4992
|
Dual focus tubes employ cathodes with two filaments: one small, the other large. Each filament is positioned in its own slot. The smaller filament produces a small focal spot for fine focus work. The larger filament, which produces a broader focal spot, is employed when faster exposures (higher intensities) are required. These dual focus tubes usually have a switch at the end of the cathode arm that is used to select the desired focal spot.
|
Back to top
|
|
Moderator(s): Chris Russell, Noelle, Alex, Tesladownunder, Dave Marshall, Dave Billington, Bjørn, Steve Conner, Wolfram, Kizmo, Mads Barnkob
|
|
Powered by e107 Forum System
|